FiftyThree, the developers behind popular sketching app Paper, have announced that they are bringing the app to the iPhone. There's little information on the iPhone version of the app so far, with FiftyThree only saying that it's "coming soon" and posting a teaser image.
While still only a teaser, there's some information to be gleaned from the image. It appears that Paper for iPhone will support images, something that the iPad app currently does not, as well as text input. There appears to be support for checklists. The image also indicates that Paper for iPhone will support FiftyThree's Pencil stylus, though this would not be at all surprising.
Paper originally launched on the iPad back in 2012, offering an easy way to get started creating. Over time, the app has added several features, most recently the Think Kit suite of productivity tools.